TWO-LAYER CLAD ALUMINUM ALLOY TUBE WITH INNER SURFACE GROOVE, HEAT EXCHANGER, AND METHOD OF MANUFACTURING TWO-LAYER CLAD ALUMINUM ALLOY TUBE WITH INNER SURFACE GROOVE

PROBLEM TO BE SOLVED: To provide a two-layer clad aluminum alloy tube with an inner surface groove in which a surface lap scratch is suppressed that may occur in form rolling.SOLUTION: A two-layer clad aluminum alloy tube with an inner surface groove is characterized in that the two-layer clad alumi...

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Bibliographische Detailangaben
Hauptverfasser:	WAKAKURI SATOSHI, ISHIDA KOICHI, OTANI YOSHIYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEATING LIGHTING MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a two-layer clad aluminum alloy tube with an inner surface groove in which a surface lap scratch is suppressed that may occur in form rolling.SOLUTION: A two-layer clad aluminum alloy tube with an inner surface groove is characterized in that the two-layer clad aluminum alloy tube with an inner surface groove is formed from a core material comprised of an aluminum alloy, and a skin material comprised of an aluminum alloy clad on an outer surface of the core material, and is formed with a projecting type groove on the inner surface of the core material, wherein if hardness of the core material is Ha, and hardness of the skin material is Hb, then Hb/Ha>0.7, and a mean clad rate of the clad material is 11% or less. Preferably, the core material is an aluminum alloy containing Mn: 0.8 to 1.8 mass%, Cu:0.4 to 0.7 mass%, Si:0.02 to 0.2 mass% and residual aluminum, and the skin material is an aluminum alloy containing Mn:0.3 to 1.5 mass%, Zn: 1.0 to 7.0 mass%, and residual aluminum.